In dogs, long hair is typically a recessive trait controlled by the FGF5 gene.
Part 1: If two dogs are carriers for the long hair trait, describe the probability of genotypes and phenotypes in their offspring. Use a Punnett square to help determine the probability of the possible genotypes and phenotypes in the offspring. Explain your results in paragraph form.
Part 2: Harley has two dogs. One dog has long hair, and the other dog has short hair. When these two dogs have puppies, Harley notices that none of the puppies have long hair. Explain how Harley can use a test cross to determine the genotype of the parent dog with short hair.
